The busiest bridge: connecting the Control Centre to the device. It carries commands, receives results, checks status, triggers downloads, delivers reports. Five different gadgets in one interface! The heartbeat of IoT eSIM communication.
A direct line from the Control Centre to the Profile Factory. When a sleepy device can't reach the factory, the Control Centre does it instead. Authenticate, download, cancel: all handled by remote proxy!
The Control Centre uses this to check the Message Board on behalf of sleepy devices. The device never talks to the board at all: the Control Centre checks, finds any waiting notes, and forwards them. Zero extra battery drain!
The most important gadget! It's a logical tunnel inside the main highway. Every command gets two signatures: one from the Control Centre (who sent it) and one from the chip (who executed it). Double-proof that everything is legitimate!
SGP.32 added eight new chip-level commands! Load signed packages, set up the first trusted manager, read the contact list, rollback bad changes, instant activation, and the emergency parachute: a fallback profile that activates if everything else fails.
Even though ESep has no separate wires: it's just a logical tunnel: it's arguably the most important interface. Every remote management command flows through its double-signed tunnel, making it the backbone of IoT device security!
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